Multiple Functions: The hand massagers for muscles offers 6 modes, 6 massage intensities, 2 heating levels, and 3 timers(10/15/20min), allowing you to customize your massage experience. Kneading and air pressure promote blood circulation, reduce fatigue and stiffness of fingers and palms, arthritis and carpal tunnel syndrome relief, and warming of your cold hands.NOTE Please make sure to close and tighten the bottom air valve button to increase the inflation level of the air cushion and enhance the massage experience. Long-lasting and Portable: The thera palm massager with a built-in 3000mAh lithium battery offering 120min(with heating)/90min(without heating) working hours after full charging, With lightweight and portable design, it's convinently used either at home, in the office, or while traveling. The type C interface can be used with the plug of the laptop or power bank to provide a convenient charging. You can get better relaxation at anytime and anywhere. (NOTE: Do not use during charging.) Cooling Fan & Adjustable Heating: This carpal tunnel massager is equipped with two levels heating function. It s set with a safe temperature control not exceeding 45 . This hand and wrist massager has an unique built-in fan so that your hands don't get sweaty and can be used all year-round. Pressure-Sensing Airbags: This hand massager for arthritis features pressure point therapy with unique bidirectional palm roller and adjustable wrist straps. The soft, zoned airbags work with pressure sensors to automatically adapt to your hand size and deliver the optimal pressure level, helping you find the most comfortable massage experience. You can choose a pattern and strength that suits your hand needs. Thoughtful Gift Choice: This hand massagers has more space to accommodate different palm sizes, conform to ergonomic design, making it the perfect thanksgiving, christmas or birthday gift for women, gift for men, gifts for seniors paretns, gifts for mom and dad, gifts for grandparents, gift for wife or husband. It's like an on-call professional personal masseur, perfect for professionals, pianists, workers,office staffs, and painters.